CN111535157A - High pier that can reduce hydration heat of mass concrete and its construction method - Google Patents
High pier that can reduce hydration heat of mass concrete and its construction method Download PDFInfo
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- 238000006703 hydration reaction Methods 0.000 title claims abstract description 16
- 230000036571 hydration Effects 0.000 title claims abstract description 15
- 238000010276 construction Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 238000005192 partition Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 10
- 239000000498 cooling water Substances 0.000 claims description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 5
- 238000005086 pumping Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
Description
技术领域technical field
本发明涉及桥梁工程技术领域,具体公开了一种可降低大体积混凝土水化热的高墩及其施工方法。The invention relates to the technical field of bridge engineering, and specifically discloses a high pier capable of reducing the hydration heat of mass concrete and a construction method thereof.
背景技术Background technique
随着科技的发展,大跨度跨线、跨河等桥梁不断呈现,桥墩的高度不断升高,大体积混凝土逐渐成为构建桥墩的重要组成部分。但是由于现有施工的一些缺陷,导致桥墩出现裂缝等多项温缩裂缝病害,严重影响桥梁质量。造成裂缝的原因可分为两类:一是结构性裂缝,一般是由外荷载引起的;二是材料型裂缝,一般是由温度应力和混凝土的收缩引起的。大体积混凝土在浇筑施工以及后期养护过程中,水泥水化反应放出大量的热量即水化热,导致混凝土内部集聚大量热量无法散出,最终导致混凝土收缩、出现混凝土裂缝。所以需要在混凝土浇筑施工过程中,降低水化热,使混凝土聚集的热量散出,避免混凝土出现裂缝病害。With the development of science and technology, large-span cross-line and river-crossing bridges continue to appear, and the height of piers continues to increase. Mass concrete has gradually become an important part of building piers. However, due to some defects in the existing construction, a number of temperature-shrinkage cracks such as cracks appear in the bridge piers, which seriously affect the quality of the bridge. The causes of cracks can be divided into two categories: one is structural cracks, which are generally caused by external loads; the other is material cracks, which are generally caused by thermal stress and shrinkage of concrete. In the process of pouring and post-curing of mass concrete, the hydration reaction of cement releases a large amount of heat, that is, the heat of hydration, which leads to a large amount of heat accumulated inside the concrete that cannot be dissipated, and eventually leads to shrinkage of the concrete and cracks in the concrete. Therefore, in the process of concrete pouring, it is necessary to reduce the heat of hydration, so that the heat accumulated in the concrete can be dissipated, so as to avoid cracks and diseases in the concrete.
发明内容SUMMARY OF THE INVENTION
本发明意在提供一种可降低大体积混凝土水化热的高墩及其施工方法,以解决混凝土内部热量聚集而无法散出的问题。The present invention aims to provide a high pier and a construction method thereof that can reduce the hydration heat of large-volume concrete, so as to solve the problem that the heat inside the concrete cannot be dissipated.
为了达到上述目的,本发明的基础方案为:In order to achieve the above object, the basic scheme of the present invention is:
可降低大体积混凝土水化热的高墩,包括竖向钢筋骨架、若干水平钢筋层以及冷却单元,所述冷却单元包括连接装置、若干水平冷却层、竖向通水管和隔板,所述连接装置的一端与水平钢筋层连接,连接装置的另一端与水平冷却层连接,所述水平冷却层包括蜿蜒成型的螺纹钢管,水平冷却层整体呈圆形且朝向竖向通水管的方向向下倾斜;所述竖向通水管上竖直设有若干组联通节点,所述联通节点包括入水口和出水口,所述入水口位于出水口的下方,入水口和出水口分别与螺纹钢管的两端联通;竖向通水管内竖直固定设有若干限位杆,所述隔板上设有限位孔,限位杆与限位孔滑动密封接触,隔板与竖向通水管的内壁滑动密封接触,所述隔板上竖直设有曲面形的竖直板,竖直板上设有若干第一固定孔,所述竖向通水管的上部设有能够与第一固定孔对齐的第二固定孔,所述第一固定孔与入水口和出水口交错,所述竖直板的底部设有流水孔,流水孔能够与入水口对齐。A high pier capable of reducing the hydration heat of mass concrete, comprising a vertical steel skeleton, several horizontal reinforcing steel layers, and a cooling unit, the cooling unit comprising a connecting device, several horizontal cooling layers, a vertical water pipe and a partition, the connecting One end of the device is connected with the horizontal steel bar layer, and the other end of the connecting device is connected with the horizontal cooling layer. Inclined; several groups of communication nodes are vertically arranged on the vertical water pipe, and the communication nodes include a water inlet and a water outlet, the water inlet is located below the water outlet, and the water inlet and the water outlet are respectively connected with the two sides of the threaded steel pipe. The ends are connected; a number of limit rods are vertically fixed in the vertical water pipe, and limit holes are arranged on the partition plate. contact, a curved vertical plate is vertically arranged on the partition plate, a plurality of first fixing holes are arranged on the vertical plate, and the upper part of the vertical water pipe is arranged with a second fixing hole that can be aligned with the first fixing hole. A fixing hole, the first fixing hole is staggered with the water inlet and the water outlet, the bottom of the vertical plate is provided with a water flow hole, and the water flow hole can be aligned with the water inlet.
可选地,所述连接装置包括两个固定环和一根固定杆;若干连接装置中,固定杆的长度不同,两个固定环呈上下分布,固定环包括两个半环形的固定箍,两个固定箍通过螺栓固定连接,所述固定杆的下端与下方的固定环固定连接,固定杆的上端转动设有转动座,转动座与上方的固定环连接,上方的所述固定环与水平冷却层连接,下方的固定环与水平钢筋层连接。Optionally, the connecting device includes two fixing rings and a fixing rod; among the several connecting devices, the lengths of the fixing rods are different, the two fixing rings are distributed up and down, and the fixing ring includes two semi-annular fixing hoop, the two Each fixing hoop is fixedly connected by bolts, the lower end of the fixing rod is fixedly connected with the lower fixing ring, the upper end of the fixing rod is rotated with a rotating seat, the rotating seat is connected with the upper fixing ring, and the upper fixing ring is connected with the horizontal cooling Layer connection, the lower fixing ring is connected to the horizontal reinforcement layer.
可选地,所述竖向通水管的底部联通有出水管,所述出水管呈L形。Optionally, a water outlet pipe is communicated with the bottom of the vertical water passage pipe, and the water outlet pipe is L-shaped.
可选地,所述出水管内放置有金属软管制成的吸水管,吸水管的上端联通有抽水泵。Optionally, a water suction pipe made of a metal hose is placed in the water outlet pipe, and a suction pump is communicated with the upper end of the water suction pipe.
可降低大体积混凝土水化热的高墩的施工方法,包括以下步骤:The construction method of high piers that can reduce the hydration heat of mass concrete, including the following steps:
S1,将竖向通水管竖直固定在竖向钢筋骨架和水平钢筋层上;S1, the vertical water pipe is vertically fixed on the vertical steel frame and the horizontal steel layer;
S2,每隔若干水平钢筋层,将连接装置中下方的固定环安装在水平钢筋层上,且若干连接装置围成若干圈同心圆状,越靠近竖向通水管连接装置中固定杆的长度越小,且位于同一圆上的连接装置中的固定杆长度相同;将水平冷却层固定在连接装置中上方的固定环内;S2, every several horizontal steel bar layers, install the lower fixing ring in the connecting device on the horizontal steel bar layer, and several connecting devices are surrounded by several concentric circles, the closer to the vertical water pipe connecting device, the longer the length of the fixing rod Small, and the fixing rods in the connecting devices located on the same circle are of the same length; the horizontal cooling layer is fixed in the upper fixing ring in the connecting device;
S3,将水平冷却层中的螺纹钢管的两端分别与竖向通水管的入水口和出水口密封联通;S3, sealingly connect the two ends of the threaded steel pipe in the horizontal cooling layer with the water inlet and the water outlet of the vertical water pipe;
S4,当水平钢筋层和水平冷却层均搭建完成后,将隔板上的限位孔对准竖向通水管的限位杆,然后将隔板滑入到竖向通水管的底部,使竖直板上的第一固定孔能够与竖向通水管的第二固定孔对齐,再使用插销插入到第一固定孔和第二固定孔中将隔板和竖直板固定在竖向通水管上,此时隔板将最下方的出水口和入水口隔开;S4, when the horizontal steel bar layer and the horizontal cooling layer are built, align the limit hole on the partition with the limit rod of the vertical water pipe, and then slide the partition to the bottom of the vertical water pipe to make the vertical water pipe The first fixing hole on the straight plate can be aligned with the second fixing hole of the vertical water pipe, and then use the plug to insert the first fixing hole and the second fixing hole to fix the partition plate and the vertical plate on the vertical water pipe , at this time the partition separates the bottom water outlet from the water inlet;
S5,浇筑混凝土,并向竖向通水管中通入冷却水,冷却水流到最下方的入水口中,再从入水口流到水平冷却层并对附近的混凝土进行冷却,再从出水口流出;随着混凝土逐渐增多,再拆下插销,向上拔出竖直板再用插销固定竖直板,此时隔板的位置向上移动一段距离,并将上一组联通节点的出水口和入水口隔开,继续向竖向通水管中通入冷却水;S5, pour concrete, and pass cooling water into the vertical water pipe, the cooling water flows to the bottom water inlet, and then flows from the water inlet to the horizontal cooling layer and cools the nearby concrete, and then flows out from the water outlet; As the concrete gradually increases, remove the latch, pull out the vertical plate upwards, and fix the vertical plate with the latch. At this time, the position of the partition moves up a certain distance, and separates the water outlet and the water inlet of the previous set of communication nodes. , continue to pass cooling water into the vertical water pipe;
S6,混凝土浇筑完成后,将竖直板和隔板完全拔出再向竖向通水管中继续通入冷却水,直到冷却完成;S6, after the concrete pouring is completed, the vertical plate and the partition plate are completely pulled out, and then the cooling water continues to be poured into the vertical water pipe until the cooling is completed;
S7,将竖向通水管和出水管中的冷却水全部抽出,再向其中灌入水泥砂浆,待其成型即可。S7, all the cooling water in the vertical water pipe and the water outlet pipe is drawn out, and then cement mortar is poured into it, and it is ready to be formed.
本方案的工作原理及有益效果在于:The working principle and beneficial effects of this scheme are as follows:
1、本方案中的水平冷却层固定在水平钢筋层上,基本不影响水平钢筋层的结构;且其倾斜设置,当冷却完成后,水平冷却层中的水能够自行出,后续向竖向通水管内注入水泥砂浆时,水泥砂浆才能够填充到水平冷却层内,保证竖向通水管和水平冷却层的结构强度。1. The horizontal cooling layer in this scheme is fixed on the horizontal steel bar layer, which basically does not affect the structure of the horizontal steel bar layer; and it is set at an inclination. When the cement mortar is injected into the water pipe, the cement mortar can be filled into the horizontal cooling layer to ensure the structural strength of the vertical water pipe and the horizontal cooling layer.
2、本方案中,假设隔板将最下方联通节点的出水口和入水口隔开,当冷却水进入竖向通水管时,由于其余联通节点的入水口和出水口都与竖向通水管联通,所以水仅仅只会填充满上方的水平冷却层,而其中的水流动性则较差。大部分水流会直接流向最下方的入水口,再从最下方的出水口中流出,所以最下方的水平冷却层中的水流动速度很快,能够快速换热、冷却混凝土;混凝土继续浇筑时,其高度越来越高,再将隔板向上移动,同理,相应的水平冷却层中的水流动速度快,使该部分的混凝土得到快速冷却。本方案中实现了针对性的快速冷却,加快局部混凝土的冷却速度,同时,由于冷却水始终充满在所有的水平冷却层内,所以其余水平冷却层附近的混凝土都能够得到有效地换热降温处理。2. In this scheme, it is assumed that the partition plate separates the water outlet and the water inlet of the lowest connection node. When the cooling water enters the vertical water pipe, the water inlet and outlet of the other connection nodes are connected with the vertical water pipe. , so the water only fills the horizontal cooling layer above, where the water is less mobile. Most of the water flow will flow directly to the bottom water inlet, and then flow out from the bottom water outlet, so the water in the bottom horizontal cooling layer flows very fast, which can quickly exchange heat and cool the concrete; when the concrete continues to be poured, its The height is getting higher and higher, and then the partition plate is moved upward. Similarly, the water in the corresponding horizontal cooling layer flows fast, so that the concrete in this part is rapidly cooled. In this scheme, targeted rapid cooling is achieved to speed up the cooling rate of local concrete. At the same time, since the cooling water is always filled in all the horizontal cooling layers, the concrete near the remaining horizontal cooling layers can be effectively cooled by heat exchange. .
附图说明Description of drawings
图1为本实施例的结构示意图;Fig. 1 is the structural representation of this embodiment;
图2为图1中竖向通水管的顶部部分结构示意图FIG. 2 is a schematic structural diagram of the top part of the vertical water pipe in FIG. 1
图3为水平冷却层、竖向通水管和出水管的结构示意图;3 is a schematic structural diagram of a horizontal cooling layer, a vertical water pipe and a water outlet;
图4为竖向通水管的纵向剖视图;Figure 4 is a longitudinal sectional view of a vertical water pipe;
图5为连接装置的结构示意图;Fig. 5 is the structural representation of the connection device;
图6为固定杆和固定环的结构示意图。FIG. 6 is a schematic structural diagram of a fixing rod and a fixing ring.
具体实施方式Detailed ways
下面通过具体实施方式进一步详细说明:The following is further described in detail by specific embodiments:
说明书附图中的附图标记包括:竖向钢筋骨架1、水平钢筋层2、竖向通水管3、出水管4、限位杆5、竖直板6、第一固定孔7、第二固定孔8、入水口9、出水口10、螺纹钢管11、插销12、隔板13、固定箍14、延伸板15、螺栓16、固定杆17。The reference numerals in the accompanying drawings include:
本实施例基本如图1所示:This embodiment is basically shown in Figure 1:
可降低大体积混凝土水化热的高墩,包括竖向钢筋骨架1、若干水平钢筋层2以及冷却单元。A high pier that can reduce the hydration heat of mass concrete includes a
结合图4、图5和图6,冷却单元包括连接装置、若干水平冷却层、竖向通水管3和隔板13。连接装置包括两个固定环和一根固定杆17;若干连接装置中,固定杆17的长度不同,两个固定环呈上下分布。固定环包括两个半环形的固定箍14,两个固定箍14的两侧均一体成型有向外延伸的延伸板15,延伸板15上设有螺纹孔,螺栓16拧入螺纹孔后再使用螺母将其固定以保证两个固定箍14围成圆形的固定环。固定杆17的下端与下方的固定环固定连接,固定杆17的上端转动设有转动座,转动座的转动方向沿固定环的周向,转动座与上方的固定环固定连接。上方的固定环与水平冷却层连接,下方的固定环与水平钢筋层2连接。4 , 5 and 6 , the cooling unit includes a connecting device, several horizontal cooling layers,
结合图2、图3,水平冷却层包括蜿蜒成型的螺纹钢管11,水平冷却层整体呈圆形且朝向竖向通水管3的方向向下倾斜。竖向通水管3上竖直设有若干组联通节点,联通节点包括入水口9和出水口10,入水口9位于出水口10的下方,入水口9和出水口10分别与螺纹钢管11的两端联通。竖向通水管3内竖直固定设有若干限位杆5,隔板13上设有限位孔,限位杆5与限位孔滑动密封接触,隔板13与竖向通水管3的内壁滑动密封接触,隔板13上竖直固定设有曲面形的竖直板6,竖直板6与竖向通水管3的内壁贴合。竖直板6上设有若干第一固定孔7,竖向通水管3的上部设有能够与第一固定孔7对齐的第二固定孔8,第一固定孔7与入水口9和出水口10交错。竖直板6的底部设有流水孔,流水孔能够与入水口9对齐。竖向通水管3的底部联通有出水管4,出水管4呈L形。出水管4内放置有金属软管制成的吸水管,吸水管的上端联通有抽水泵。Referring to FIGS. 2 and 3 , the horizontal cooling layer includes a meandering threaded
可降低大体积混凝土水化热的高墩的施工方法,包括以下步骤:The construction method of high piers that can reduce the hydration heat of mass concrete, including the following steps:
S1,将竖向通水管3竖直固定在竖向钢筋骨架1和水平钢筋层2上;S1, the
S2,每隔若干水平钢筋层2,将连接装置中下方的固定环安装在水平钢筋层2上,且若干连接装置围成若干圈同心圆状,越靠近竖向通水管3连接装置中固定杆17的长度越小,且位于同一圆上的连接装置中的固定杆17长度相同;将水平冷却层固定在连接装置中上方的固定环内;S2, every several horizontal reinforcement layers 2, the lower fixing ring in the connection device is installed on the
S3,将水平冷却层中的螺纹钢管11的两端分别与竖向通水管3的入水口9和出水口10密封联通;S3, the two ends of the threaded
S4,当水平钢筋层2和水平冷却层均搭建完成后,将隔板13上的限位孔对准竖向通水管3的限位杆5,然后将隔板13滑入到竖向通水管3的底部,使竖直板6上的第一固定孔7能够与竖向通水管3的第二固定孔8对齐,再使用插销12插入到第一固定孔7和第二固定孔8中将隔板13和竖直板6固定在竖向通水管3上,此时隔板13将最下方的出水口10和入水口9隔开;S4, after the construction of the
S5,浇筑混凝土,并向竖向通水管3中通入冷却水,冷却水流到最下方的入水口9中,再从入水口9流到水平冷却层并对附近的混凝土进行冷却,再从出水口10流出;随着混凝土逐渐增多,再拆下插销12,向上拔出竖直板6再用插销12固定竖直板6,此时隔板13的位置向上移动一段距离,并将上一组联通节点的出水口10和入水口9隔开,继续向竖向通水管3中通入冷却水;S5, pour concrete, and pass cooling water into the
S6,混凝土浇筑完成后,将竖直板6和隔板13完全拔出再向竖向通水管3中继续通入冷却水,直到冷却完成;S6, after the concrete pouring is completed, the
S7,将竖向通水管3和出水管4中的冷却水全部抽出,再向其中灌入水泥砂浆,待其成型即可。S7, all the cooling water in the vertical
以上所述的仅是本发明的实施例,方案中公知的具体结构及特性等常识在此未作过多描述。应当指出,对于本领域的技术人员来说,在不脱离本发明结构的前提下,还可以作出若干变形和改进,这些也应该视为本发明的保护范围,这些都不会影响本发明实施的效果和本发明的实用性。The above descriptions are only embodiments of the present invention, and common knowledge such as well-known specific structures and characteristics in the solution are not described too much here. It should be pointed out that for those skilled in the art, on the premise of not departing from the structure of the present invention, several modifications and improvements can also be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and applicability of the present invention.
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